Run-flat test evidence and approvals
The tests, approvals, standards and service records behind Tyron systems. Procurement teams can ask for any of them.
Independent testing
| Item | Result | System |
|---|---|---|
| TÜV handling test | 3 km at 80 km/h, then a further 3 km at 50 km/h, through a handling course and slalom, on a range of vehicles. Certificate and video available. | Multiband |
| TÜV runflat distance | 100 km at 50 km/h with two tyres deflated, then a further 50 km at 30 km/h with all four tyres deflated. | 17-inch ATR on a Toyota Fortuner |
| TÜV against Finabel | Independently tested by TÜV to exceed the Finabel standards. | ATR with R4 and R6 wheels |
| Finabel distance and speed | Tested in accordance with the Finabel standards for distance and speed. In all tests the ATR far exceeded the requirements. | ATR |
| Heavy truck blowout | 49-tonne truck, blowouts at 60 and 80 km/h, driver stays in control. Filmed. | Multiband |
| Testing speed | Testing speed for Tyron bands and rubber runflats raised to 250 km/h. Internal testing validated by external test facilities in Europe. | Multiband and ATR |
| Fire appliance blowout | Fully laden Sabre type B water tender, controlled blowout at 60 mph (97 km/h). Remained controllable through a tight course with no corrective action by the driver. | Multiband |
| Police van blowout | Double front blowout with 11 officers on board. Full control maintained, no damage to either wheel rim. | Multiband |
| Why results vary | Results depend on speed, weight, tyre aspect ratio, age and make, road conditions, cause of deflation, ambient temperature and another major factor, the suspension. Tyron recommends buyers test on their own vehicles. | All systems |
Military and government adoption
| Item | Result | System |
|---|---|---|
| NATO | Approved by NATO, with NATO stock numbers (NSN) for the ATR range and Multibands. Stock numbers supplied on request. | Multiband and ATR |
| UK Ministry of Defence | Used by the UK MoD, and "protecting the MoD for 30 years" (2018). Separately, in the early 1980s Tyron developed steel bands for Land Rover steel wheels at the MoD’s request. | Multiband; steel safety band |
| UK police: public-order vehicles | Mandated for the riot vehicles of every police force in the UK. | Multiband |
| UK police: pursuit vehicles | Selected by Cumbria Constabulary and Cheshire Constabulary for fast pursuit vehicles, replacing run-flat tyres (2021). Greater Manchester, Kent, Norfolk, Suffolk, Surrey and Sussex followed in 2022 on protected carriers, crew buses and pursuit cars. | Multiband |
| UK MoD Ridgback and Mastiff | Complete wheel, tyre and runflat assemblies (ATR-MP with Michelin X Force ZL 16.00R20) delivered for the MoD upgrade programme: first batch early 2021, second batch of 101 assemblies from February 2022. | ATR-MP wheel assembly |
| UK MoD PMETS | Complete wheel, tyre and runflat assemblies delivered for the Protected Mobility Engineering and Technical Support programme (reported June 2022). | ATR wheel assembly |
| Armoured vehicle manufacturer | Full vehicle sets of ATR-Carbon for the prototype, test vehicles and first production batch of an international armoured vehicle manufacturer, 2022. | ATR-Carbon |
| Customer base | NATO, many of the world’s military vehicle and truck manufacturers, governments and defence forces, emergency services, private security companies, NGOs, and construction and mining heavy-vehicle users. | All systems |
| Operating environments | In service with defence and security organisations from high-temperature desert to arctic cold. | ATR |
| Operators in Malaysia and Singapore | Malaysia Ministry of Health, Fire and Rescue Department Malaysia, St John Ambulance Malaysia, Singapore Civil Defence Force, Singapore Police Force, Changi Airport Group. | Multiband |
Standards
| Item | Result | System |
|---|---|---|
| Finabel 20.A.5 and A.20.A | Military standards requiring a guaranteed minimum runflat distance of 50 km, preferably 75 km, and a minimum of two hours off-road over hills and obstacles with two tyres deflated. The tyre may not slip more than one revolution during the off-road test. | Reference standard for the ATR |
| Finabel ballistic requirement | Five 7.62 mm rounds through the sidewall and two into the tread. | Reference standard for the ATR |
| Finabel compliance | Beadlock enabling the vehicle to keep moving at speed in full compliance with on-road and off-road Finabel standards. Compatible with CTIS and standard wheels. | ATR-MP (Ridgback and Mastiff assemblies) |
| Wheel standard | All Tyron-supplied wheels are manufactured and tested to a minimum of SAE J1992. | Tyron wheels |
Ballistic and beadlock
| Item | Result | System |
|---|---|---|
| Ballistic test | 35 rounds of 7.62 mm, 20 through the sidewall and 15 into the tread, against the 7 the Finabel test asks for. Direct hits on the fixings ricocheted off or passed through without structural damage. | ATR |
| Ballistic design intent | Tested ballistically and for endurance to show the vehicle can keep moving for more than 100 km at speed. | ATR |
| Beadlock wheels | R4 forged and cast, R6 and R7 wheels provide beadlock to the Finabel standards when an ATR is fitted. | R4, R6, R7 |
| R4 double beadlock | Double beadlock with the All Terrain Rubber runflat: evasive driving with two or more tyres shot out, and a minimum of 50 km at 50 km/h. | R4 with ATR |
| Beadlock by design | Rubber runflats are made wider than nominal to absorb wheel and tyre tolerances, compressing the tyre beads against the wheel flanges. Clamping force is kept regardless of tyre make. | ATR, ATR-Beadlock |
| Five guarantees | The runflat cannot move on the wheel. The tyre cannot slip on the wheel. Sand, dirt and mud cannot enter the flat tyre. The beads stay locked to the flanges for cornering and steering control. The bead cannot be damaged at installation or tyre change. | R4 and R6 wheels with ATR |
Ratings and capability
| Item | Result | System |
|---|---|---|
| ATR-MP runflat distance | Up to 150 km, far exceeding the Finabel standard. With the R4 wheel, over 50 km on or off road with all four tyres deflated. Minimum guarantee across the ATR range: 50 km. | ATR-MP; R4 with ATR-MP |
| R4 load rating | 1,600 kg per wheel (2009). 1,900 kg for the 18-inch R4 (2019). Range in 16, 17 and 18 inch. | R4 |
| R7 specification | 18 inch: 29 kg, 1,850 kg maximum load, 8.5J. 17.5 inch: 33 kg, 2,360 kg maximum load, 7.5J. On-road 50 km at 50 km/h minimum; off-road Finabel A.20.A for two hours minimum. | R7 with 18-650ATR and 17.5-580ATR |
| Bolt-together wheel range | Two-piece bolt-together wheels from 16 to 22.5 inch in steel and aluminium, 1,600 kg to 5,800 kg per wheel. 20-inch runflats for 335/80R20, 365/80R20, 365/85R20, 395/85R20, 10R20, 11R20, 12R20, 12.5R20, 14R20 and 16R20 tyres, designed to carry the full capacity of the tyre. | R-series wheels; ATR |
| ATR-Carbon weight | A carbon-fibre spine in place of the ATR-MP metal spine cuts runflat weight by about 40%. On an 8×8 on 16.00R20, around 250 kg of unsprung mass saved. | ATR-Carbon |
| Multiband HD | Up to 50 km with one or more tyres deflated. Weighs under 2 kg. RFID and TPMS bracket as standard. | Multiband HD |
| ATR-EasyFit | Up to 50 km with one or more tyres deflated. For 16 to 22.5 inch wheels, fitted without specialist tools. Launched June 2022. | ATR-EasyFit |
| Multiband | A medium distance at reduced speed with two or more tyres deflated, to reach somewhere safe to change the wheel. About 1 kg (15 inch) to 2 kg (22.5 inch). Commercial range 17.5 to 22.5 inch. | Multiband |
Guarantee and warranty
| Item | Result | System |
|---|---|---|
| Product guarantee | Guaranteed to lock the tyre on the wheel rim in a puncture or blowout. Maintenance free, no moving parts, no effect on fuel consumption, acceleration or braking. | Multiband |
| Patents and trademark | Tyron is a registered trademark. Its flat tyre protection systems are patented in most countries. | All systems |
| Warranty | 10 years from installation, registered to the vehicle chassis number. | Multiband (Tyron Asia warranty terms) |
Track record
| Item | Result | System |
|---|---|---|
| 1977 | The Tyron Safety Band is invented: an aluminium wheel and band. | Safety Band |
| Early 1980s | Steel bands for Land Rover steel wheels at the British MoD’s request. | Steel safety band |
| 2002 | The Multiband is redesigned and patented: height-adjustable, with plug-in feet gripping the wheel. | Multiband |
| 2008 | World’s first multi-piece rubber runflat, the ATR-MP, fitted to military split rims without special tools or hydraulic presses. | ATR-MP |
| 2009 | R4 wheel for armoured 4×4 and cash-in-transit vehicles, 1,600 kg, with beadlock. | R4 |
| 2013 | Partnership with Global Wheels of South Africa: complete wheel assemblies with Michelin, Pirelli and Continental tyres. | Wheel assemblies |
| 2018 | ATR-Beadlock introduced. Tyron Rubber Co. Ltd moves into a new 24/7 factory in Thailand. Multiband HD introduced for armoured vehicles. | ATR-Beadlock; Multiband HD |
| 2019 | ATR-SP, ATR-Custom and the 18-inch R4 (1,900 kg) introduced. | ATR-SP, ATR-Custom, R4 |
| 2021 to 2022 | Ridgback and Mastiff assemblies for the UK MoD. Mandated on riot vehicles of all UK police forces; eight forces named in 2021 to 2022 for pursuit vehicles and carriers. ATR-Carbon production doubled for an armoured vehicle manufacturer. ATR-EasyFit launched. | ATR-MP, ATR-Carbon, ATR-EasyFit, Multiband |
Test documents are supplied to buyers under a specification or tender enquiry. Distances and speeds are test results, not ratings for your vehicle: see why results vary.
Testing
Tested to Finabel, and well beyond it.
Tyron’s ATR runflats are tested against the internationally recognised Finabel standards for distance and speed, and for ballistic damage. In every test the ATR exceeded the requirement.
TÜV · Distance on deflated tyres
100 kmat 50 km/h with two tyres deflated, then a further 50 km at 30 km/h with all four deflated.
17-inch ATR on a Toyota FortunerBallistic · 7.62 mm rounds
35 roundsagainst the 7 the Finabel test asks for: 20 through the sidewall and 15 into the tread.
Direct hits on the fixings ricocheted or passed through without structural damageTÜV · Handling course and slalom
3 + 3 kmat 80 km/h, then at 50 km/h, through a handling course and slalom.
Multiband, on a range of vehicles. Certificate and video available| Ballistic test | Finabel asks for | Tyron ATR tested with |
|---|---|---|
| Rounds through the sidewall | 5 | 20 |
| Rounds into the tread | 2 | 15 |
| Total | 7 | 35 |
Why results vary
Results depend on speed, weight, tyre aspect ratio, age and make, road conditions, the cause of deflation, ambient temperature and another major factor, the vehicle’s suspension. Ask us for the test documents and we will help you judge them against your own vehicles and conditions.
Request the test documentsRoad and emergency vehicles
The Multiband in a real blowout.
For commercial and emergency fleets on standard wheels: a loaded 49-tonne truck loses a tyre at 60 and 80 km/h and stays under control, and a police explainer shows how the band works.